Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Identificar os departamentos sem funcionários.
 ###Tabelas: 
CREATE TABLE Departments (department_id INT, department_name VARCHAR(50), manufacturer_id INT); INSERT INTO Departments (department_id, department_name, manufacturer_id) VALUES (1, 'Department1', 4), (2, 'Department2', 4), (3, 'Department3', 5); CREATE TABLE Employees (employee_id INT, employee_name VARCHAR(50), department_id INT); INSERT INTO Employees (employee_id, employee_name, department_id) VALUES (1, 'Employee1', 1), (2, 'Employee2', 1), (3, 'Employee3', 2); CREATE TABLE Manufacturers (manufacturer_id INT, manufacturer_name VARCHAR(50), region VARCHAR(50)); INSERT INTO Manufacturers (manufacturer_id, manufacturer_name, region) VALUES (4, 'ManufacturerD', 'North America'), (5, 'ManufacturerE', 'Asia-Pacific');
SELECT d.department_name FROM Departments d LEFT JOIN Employees e ON d.department_id = e.department_id WHERE e.employee_id IS NULL;